Generator fan construction



W. B. JUPP GENERATOR FAN CONSTRUCTION Nov. 20, 1928; 1,692,376

Filed Aug. 19, 1927 INVENTOR I Z MATTORNEYS Patented Nov. 20, 1928.

WILLIAM-1 iaorryor nnoox nfyni nnwao C MPANY; ,OFNEWYORKf-N;"Y:,

A columnar-rowernnnnwmtn GENERAIORSFAN CONSTRUCTIONIL?.Applicatiqnifiled:August-;19, 1927, Serial m. 214,124.

The present .innention gr'e-l-ates ;to.- power units wherein aprimemoveris employedto drivean ele 'itric generator or other apparatusand it is necessary to effect the cooling of one or both of themachines. It particularly, concerns units to be mounted in locationswhere the available space is designed as small as possible and it isneces sary to conserve as much room as possible.

- More particularly, the present. invention relates to power units foruse on vehicles where the generator is to be cooled through forcedventilation and it is highly desirable to consume as little space aspossible by the over-all length of the unit.

An object of the present invention is to -'provide a constructionwherein the floor length required by the unit is considerably reducedwithout removing any parts or reducing the size thereof.

More particularly, the invention relates to constructions of the abovecharacter wherein the width of the fan and fly wheel is taken off thelength of the unit by forming the web of the fly wheel at one sidethereof,

that is, form the inertia rim on one side of,

the web and secure the annular fan rotor to the outer face of the flywheel. This con-' struction provides a portion within the fly wheel andfan which is just large enough to accommodate the universal jointconnection between the units, the latter being, of course, a necessaryelement. 7

Further objects will appear as the description proceeds and referencewill now be shaft, is fly wheel b. The bolts which se cure these twoelements are designated by reference character a As pointed out above,it is highly desirable to conserve as much room as possible and inpursuance thereof, the fly wheel is flanged outwardly so that theinertia portion. thereof extends; over.v a" portion of the universahjoint between the engine. and .the generator- Ithasbeen found thataafan,iof the s uirrel-cagetype ,when ,constructed to give 1; 1e desiredflow of, air through the gen; erator, and connected to-l'he ,fan asdescribed later, is of a size sufiiciently small, to be secured to theouter rim of the fly wheel and not require the space between the flywheel and the generator to be increased over the amount necessary forthe proper universal joint connection therebetween.

This construction, therefore, includes an annular disc 0 secured to theinterior of the flywheel Z2 at 0, and carrying in its restricted neckportion 0 the centering portion of a universal joint connection 0 Thegenerator shaft clhas keyed thereto a collar (Z, on the outer surface ofwhich is a hearing surface d Suitable arms (Z are formed on J and carry,at their outer extremities, seats d These seats may be removablethroughthe connection comprising a stub shaft 0K and-nut d Arms d extendoutwardly from the collar CZ at spaced intervals to form a spider.Similar arms co-operating therewith, are secured to the disc member 0which is mounted on the fly wheel and the outer extremities of the armsmounted on the disc are adapted to lie between the respective armsBetween the adjacent arms, rubber blocks or other cushioning means aremounted. In this manner, the irregularities in the torque of the drivingshaft are dampened. j To the outer rim of the fly wheel Z), a

squirrel cage fan 6 is secured by means of bolts 6 The fancomprises twoannular .discs e, spaced by vanes e which are formed and positioned toforce air outwardly upon rotation of the crank shaft a in the properdirection. A shroud f is secured to the outer shell of the generator gand extends into the fan rotor. At the eX- tremity of the shroud f acircumferential lip f is formed providing a relativelytight connection,as far as the flow of air is concerned'between the shroud and fan. Itwill be apparent that as the fan rotates, the air will be sucked throughthe generator as in dicated by the arrows, and forced outwardly from thefan, thus cooling the generator.

The connection described above requires scarcely no more room than theold form of connection which did not mount the. fan

RK ASSIGNOR TO INTERNATION-AE M0 TQR" I and fly wheel. It will beseen,theref0re, that the room previously occupied by the fan and flywheel is conserved by the above construction.

Although the invention has been described with reference to theaccompanying drawings, it is not to be limited save as defined by theappended claims.

lVhat'I claim is: I

1. In combination, two units, connecting means therebetween, a flywheelformed with a web and an inertia portion offsetwith respect thereto andprojecting toward one of theunits; a fan secured to the face of theinertia portion. of the flywheel adjacent said last named unit, andmeans to secure WILLIAM B. JUPP.

